Calculate the solubility (in m) of cobalt(ii) hydroxide, co(oh)2(s) in h2o. ksp = 1.00×10-16 at a specific temperature.

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07-04-2018
Chemistry

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Calculate the solubility (in m) of cobalt(ii) hydroxide, co(oh)2(s) in h2o. ksp = 1.00×10-16 at a specific temperature.

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superman1987 superman1987 · Answer 1 · 2018-04-16T21:39:05+02:00

superman1987 superman1987

16-04-2018

according to this reaction:

by using the ICE table:

CO(OH)2 → CO2+ + 2OH-

intial 0 0

change +X +2X

Equ X 2X

when Ksp = [CO2][OH-]^2

by substitution:

3.6 x 10^-16 = X * (2X)^2

3.6 x 10^-16 = 4 X^3

∴X = 3.88 x 10^-6 M

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